Rivière· 4 segments
Gauja / Koiva jõgi
Crosses 2 administrative regions : Taheva, Valka
Total length
25km
Max discharge
47,4m³/s
Max Strahler
5
Segments matched
4
River geography2 admin regions · 0 communes
2 administrative regions crossed (GADM L2)
- TahevaValga · Estonia8.0 kmin this dpt
- ValkaVidzeme · Latvia7.9 kmin this dpt
28 intersecting protected areas
Ziemeļgauja
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Ziemeļgauja
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Ziemeļgauja
IUCN VProtected Landscape Area
Koiva-Mustjõe
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Koiva-Mustjõe luha
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Koiva-Mustjõe maastikukaitseala
IUCN Not AssignedProtected landscape (nature park)
Limited management zone of protected landscape
Koiva-Mustjõe luha hoiuala
IUCN VILimited-conservation area
Managed conservation zone of protected landscape
19 more protected areassorted by area
VEP nr.127229
IUCN Not AssignedWoodland key habitat
Managed conservation zone of nature reserve
Malluste looduskaitseala
IUCN Not AssignedNature reserve
Koiva jõgi
IUCN Not AssignedSpawning area
Managed conservation zone of protected landscape
VEP nr.210754
IUCN Not AssignedWoodland key habitat
VEP nr.207476
IUCN Not AssignedWoodland key habitat
VEP nr.208485
IUCN Not AssignedWoodland key habitat
VEP nr.213040
IUCN Not AssignedWoodland key habitat
VEP nr.212437
IUCN Not AssignedWoodland key habitat
VEP nr.210753
IUCN Not AssignedWoodland key habitat
VEP nr.205478
IUCN Not AssignedWoodland key habitat
VEP nr.205479
IUCN Not AssignedWoodland key habitat
VEP nr.210750
IUCN Not AssignedWoodland key habitat
VEP nr.210755
IUCN Not AssignedWoodland key habitat
VEP nr.212439
IUCN Not AssignedWoodland key habitat
VEP nr.210752
IUCN Not AssignedWoodland key habitat
VEP nr.210751
IUCN Not AssignedWoodland key habitat
VEP nr.212438
IUCN Not AssignedWoodland key habitat
1 page = 1 named river (aggregation of 4 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
2 086 distinct species · 5 260 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 45 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Gauja / Koiva jõgi : 36 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 74 interactions GloBI sur 5 types (connectance 7.5%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
25km
Max discharge
47,4m³/s
Max Strahler
5
Segments matched
4
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.